<template>
    <div>
         <!--面包屑导航区域-->
        <el-breadcrumb separator="/">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>商品管理</el-breadcrumb-item>
            <el-breadcrumb-item>分类参数</el-breadcrumb-item>
        </el-breadcrumb>

        <!--卡片视图区域-->
        <el-card>
            <!--头部的警告区域-->
            <el-alert
                title="注意:只允许为第三季分类设置相关参数"
                type="warning"
                show-icon
                :closable="false"
                >
            </el-alert>

            <!--选择商品分类区域-->
            <el-row class="cat_opt">
                <el-col>
                    <span>选择商品分类: </span>
                    <!--级联选择框,选择商品分类的选择框-->
                    <el-cascader
                        expand-trigger="hover"
                        v-model="selectedCateKeys"
                        :options="cateList"
                        :props="cateProps"
                        @change="handleChange"></el-cascader>
                </el-col>
            </el-row>

            <el-tabs v-model="activeName" @tab-click="handleTabClick">
                <!--添加动态参数的面板-->
                <el-tab-pane label="动态参数" name="many">
                    <el-button type="primary" size="mini" @click="addDialogVisible=true" :disabled="isBtnDisabled">添加参数</el-button>
                    <!--动态参数的表格-->
                    <el-table :data="manyTableData" border stripe>
                        <el-table-column  type="expand">
                            <template slot-scope="scope">
                                <!--循环渲染tag标签-->
                                <el-tag closable @close="handleClose(i,scope.row)" v-for="(item,i) in scope.row.attr_vals" :key="i">{{item}}</el-tag>

                                <!--输入文本框-->
                                <el-input
                                    class="input-new-tag"
                                    v-if="scope.row.inputVisible"
                                    v-model="scope.row.inputValue"
                                    ref="saveTagInput"
                                    size="small"
                                    @keyup.enter.native="handleInputConfirm(scope.row)"
                                    @blur="handleInputConfirm(scope.row)"
                                >
                                </el-input>
                                <!--添加按钮-->
                                <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>

                            </template>
                        </el-table-column>
                        <!--索引列-->
                        <el-table-column  type="index"></el-table-column>
                        <el-table-column  label="参数名称" prop="attr_name"></el-table-column>
                        <el-table-column  label="操作">
                            <template slot-scope="scope">
                                <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row.attr_id,scope.row.attr_name)">编辑</el-button>
                                <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeParams(scope.row.attr_id)">删除</el-button>
                            </template>
                        </el-table-column>
                    </el-table>
                </el-tab-pane>
                <!--添加静态属性的面板-->
                <el-tab-pane label="静态属性" name="only">
                    <el-button type="primary" size="mini" @click="addDialogVisible=true" :disabled="isBtnDisabled">添加属性</el-button>
                    <!--静态属性的表格-->
                    <el-table :data="onlyTableData" border stripe>
                        <el-table-column  type="expand">
                            <template slot-scope="scope">
                                <!--循环渲染tag标签-->
                                <el-tag closable @close="handleClose(i,scope.row)" v-for="(item,i) in scope.row.attr_vals" :key="i">{{item}}</el-tag>

                                <!--输入文本框-->
                                <el-input
                                    class="input-new-tag"
                                    v-if="scope.row.inputVisible"
                                    v-model="scope.row.inputValue"
                                    ref="saveTagInput"
                                    size="small"
                                    @keyup.enter.native="handleInputConfirm(scope.row)"
                                    @blur="handleInputConfirm(scope.row)"
                                >
                                </el-input>
                                <!--添加按钮-->
                                <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>

                            </template>
                        </el-table-column>
                        <!--索引列-->
                        <el-table-column  type="index"></el-table-column>
                        <el-table-column  label="属性名称" prop="attr_name"></el-table-column>
                        <el-table-column  label="操作">
                            <template slot-scope="scope">
                                <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row.attr_id,scope.row.attr_name)">编辑</el-button>
                                <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeParams(scope.row.attr_id)">删除</el-button>
                            </template>
                        </el-table-column>
                    </el-table>
                </el-tab-pane>
            </el-tabs>
        </el-card>

        <!--添加参数的对话框-->
        <el-dialog
            :title="'修改' + titleText"
            :visible.sync="editDialogVisible"
            width="30%"
            @close="editDialogClosed">
            <!--添加参数表单-->
            <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="80px">
                <el-form-item :label="titleText" prop="attr_name">
                    <el-input v-model="editForm.attr_name"></el-input>
                </el-form-item>
            </el-form>
            <span slot="footer" class="dialog-footer">
                <el-button @click="editDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="editParams">确 定</el-button>
            </span>
        </el-dialog>

        <el-dialog
            :title="'添加' + titleText"
            :visible.sync="addDialogVisible"
            width="30%"
            @close="addDialogClosed">
            <!--添加参数表单-->
            <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="80px">
                <el-form-item :label="titleText" prop="attr_name">
                    <el-input v-model="addForm.attr_name"></el-input>
                </el-form-item>
            </el-form>
            <span slot="footer" class="dialog-footer">
                <el-button @click="addDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="addParams">确 定</el-button>
            </span>
        </el-dialog>
    </div>
</template>

<script>
export default {
    data(){
        return {
            //修改表单的验证规则对象
            editFormRules:{
                attr_name:[
                    {required:true,message:'请输入参数名称',trigger:'blur'}
                ]
            },
            //修改的表单数据对象
            editForm:{
                attr_id:'',
                attr_name:''
            },
            //控制修改对话的显示与隐藏
            editDialogVisible:false,
            //添加参数的表单对象
            addForm:{
                attr_name:''
            },
            //添加表单的验证规则对象
            addFormRules:{
                attr_name:[
                    {required:true,message:'请输入参数名称',trigger:'blur'}
                ]
            },
            //控制添加对话框的显示与隐藏
            addDialogVisible:false,
            //动态参数的数据
            manyTableData:[],
            //静态属性的数据
            onlyTableData:[],
            //被激活的页签的名称
            activeName:'many',
            //级联选择框的双向绑定的数据
            selectedCateKeys:[],
            //商品分类列表
            cateList:[],
            //级联选择框的配置对象
            cateProps:{
                value:'cat_id',
                label:'cat_name',
                children:'children'
            }
        }
    },
    created(){
        this.getCateList()
    },
    methods:{
        //删除对应的参数和选项
        handleClose(i,row){
            row.attr_vals.splice(i,1)
        },
        async handleInputConfirm(row){
            if(row.inputValue.trim().length === 0){
                row.inputValue = ''
                row.inputVisible = false
                return
            }
            //如果没有return，则证明输入了内容需要做后续处理
            row.attr_vals.push(row.inputValue.trim())

            row.inputValue = ''
            row.inputVisible = false

            //需要发起请求，保存这次操作
            // const {data,res} = await this.$http.put('categories/${this.cateId}/attributes/${row.attr_id}',{
            //     attr_name:row.attr_name,
            //     attr_sel:row.attr_sel,
            //     attr_vals:row.attr_vals.join(' ')
            // })

            // if(res.meta.status !== 200){
            //     return this.$message.error('修改参数项失败')
            // }
            this.$message.success('修改参数项成功')
        },
        //点击按钮展示文本输入框
        showInput(row){
            row.inputVisible = true
            
            //让文本框自动获得焦点
            this.$nextTick(_ => {
                this.$refs.saveTagInput.$refs.input.focus()
            })
        },
        //根据id删除对应的参数项
        async removeParams(id){   
             const confirmResult = await this.$confirm('此操作将永久删除该参数, 是否继续?', '提示', {
                    confirmButtonText: '确定',
                    cancelButtonText: '取消',
                    type: 'warning'
                }).catch(err => err)

            if (confirmResult !== 'confirm'){
                return this.$message.info('已取消删除')
            }

            //删除的业务逻辑
            // const {data,res} = await this.$http.delete('categories/${this.cateId}/attributes/${attr_id}')
            // if(res.meta.status !== 200){
            //     return this.$message.error('删除参数失败')
            // }
            this.$message.success('删除参数成功')
            this.getParamsData()
        },
        //点击按钮，修改参数信息
        editParams(){
            this.$refs.editFormRef.validate(async valid =>{
                //发送http请求，进行数据修改
                // if(!valid){
                //     return
                // }

                // const {data,res} = await this.$http.put('categories/${this.cateId}/attributes/${this.editForm.attr_id}',{attr_name:this.editForm.attr_name,attr_sel:this.activeName})

                // if(res.meta.status !== 200){
                //     this.$message.error('修改参数失败')
                // }

                this.$message.success('修改参数成功')

                 //隐藏表单信息
                this.editDialogVisible = false
                //发送http请求进行修改
                this.$message.success('修改名称成功')
            })
        },
        editDialogClosed(){
            //重置修改的表单
            this.$refs.editFormRef.resetFields()
        },
        //点击按钮，展示修改对话框
        showEditDialog(id,name){
            this.editDialogVisible = true

            if(this.activeName === 'many'){
                this.editForm.attr_name = name
            }else{
                this.addForm.attr_name = name 
            }
        },
        //点击按钮，添加参数
        addParams(){
            //发送http请求，进行数据添加
            // this.$refs.addFormRef.validate(async valid => {
            //     if(!valid){
            //         return
            //     }
            //     const {data,res} = await this.$http.post('categories/${this.cateId}/attributes',{
            //         attr_name: this.addForm.attr_name,
            //         attr_sel: this.activeName                    
            //     })
            // })

            // if(res.meta.status !== 201){
            //     return this.$message.error('添加参数失败')
            // }
            this.$message.success('添加参数成功')
            this.addDialogVisible = false
            this.getParamsData
        },
        //监听添加对话框的关闭事件
        addDialogClosed(){
            this.$refs.addFormRef.resetFields()
        },
        //tab页签点击事件的处理函数
        handleTabClick(){
            //发送请求获取参数信息
            this.getParamsData()
        },
        //级联选择框中项变化，会触发这个函数
        handleChange(){
            //发送请求获取参数信息
            this.getParamsData()
        },
        async getParamsData(){
            //证明选中的不是三级分类
            if(this.selectedCateKeys.length !== 3){
                this.selectedCateKeys = []
                this.manyTableData = []
                this.onlyTableData = []
                return 
            }

            //证明选中的是三级分类
            //根据所选分类的id，和当前所处的面板，获取对应的参数
            //发送http请求
            // const {data,res} = await this.$http.get('categories/${this.cateId}/attributes',{params:{sel:this.activeName}})
            // if(res.meta.status !== 200){
            //     return this.$message.error('获取参数列表失败')
            // }

            // console.log(res.data)

            if(this.activeName === 'many'){
                this.manyTableData = [{
                    "attr_id":1,
                    "attr_name":"cpu",
                    "cat_id":22,
                    "attr_sel":"only",
                    "attr_write":"manual",
                    "attr_vals":"超薄曲面 人工智能 30核HDR",
                    "inputVisible":false,
                    "inputValue":'',
                }]

                this.manyTableData.forEach(item => {
                    item.attr_vals = item.attr_vals ? item.attr_vals.split(' ') : []

                    //控制文本框的显示和隐藏
                    item.inputVisible = false
                    //文本框的输入值
                    item.inputValue = ''
                })
            }else{
                this.onlyTableData = [
                    {
                        "attr_id":1,
                        "attr_name":"cpu",
                        "cat_id":22,
                        "attr_sel":"only",
                        "attr_write":"manual",
                        "attr_vals":"超薄曲面 人工智能 30核HDR",
                        "inputVisible":false,
                        "inputValue":'',
                    }
                ]

                 this.onlyTableData.forEach(item => {
                    item.attr_vals = item.attr_vals ? item.attr_vals.split(' ') : []

                    //控制文本框的显示和隐藏
                    item.inputVisible = false
                    //文本框的输入值
                    item.inputValue = ''
                })
            }
        },
        //获取所有的商品分类数据
        async getCateList(){
            //发送http请求获取数据信息
            // const {data,res} = await this.$http.get('categories')
            // if(res.meta.status !== 200){
            //     return this.$message.error('获取商品分类失败')
            // }

            // this.cateList = res.data
            
            this.cateList = [
                {
                    "cat_id":1,
                    "cat_name":"大家电",
                    "cat_pid":0,
                    "cat_level":0,
                    "cat_deleted":false,
                    "children":[
                        {
                            "cat_id":3,
                            "cat_name":"电视",
                            "cat_pid":1,
                            "cat_level":1,
                            "cat_deleted":false,
                            "children":[
                                {
                                    "cat_id":6,
                                    "cat_name":"曲面电视",
                                    "cat_pid":3,
                                    "cat_level":2,
                                    "cat_deleted":true
                                }
                            ]
                        }
                    ]
                }
            ]
        },
    },
    computed:{
        //如果按钮需要被禁用，则返回true，否则返回false
        isBtnDisabled(){
            if(this.selectedCateKeys.length !== 3){
                return  true
            }
            return false
        },
        //当前选中的三级分类的id
        cateId(){
            if(this.selectedCateKeys.length === 3){
                return this.selectedCateKeys[2]
            }
            return null
        },
        //动态计算标题的文本
        titleText(){
            if(this.activeName === 'many'){
                return "动态参数"
            }else{
                return "静态属性"
            }
        }
    }
}
</script>

<style lang="less" scoped>
    .cat_opt{
        margin:15px 0;
    }

    .el-tag{
        margin: 10px;
    }

    .input-new-tag{
        width:120px;
    }
</style>